Which of the following pairs does not share the same empirical formula?

1) CH2O and C3H6O3

2) PbCl2 and PbCl4

3) NO2 and N2O4

4) C3H12 and CH4

Quartz, gold and calcite are examples of what

In nature, organisms mate without human interference. This is called ...

What would happen if you didn't have chemical energy in your body

What type of organism converts nitrogen into a usable form for plants? A) bacteria B) earthworms C) fungus D) mold

Which of the following statements is not a description of neptune? A. known for its strongest winds B. has no atmosphere C. one of the gas giants D. has moons

What information does the atomic mass of an element provide

The following diagram represents a vertical cross section of sedimentary rock layers that have not been overturned. Which principle best supports the conclusion that these layers have undergone extensive movement since deposition?

What kind of ions do a sodium atom and a chlorine atom become when a valence electron is transferred from one to the other?

NaOH and bleach have several characteristics in common. They include all BUT one of the characteristics listed.

What is the general form for the simplest type of acid-base reaction?